On the Nature of Spin Currents

Details On the Nature of Spin Currents On the Nature of Spin Currents

2004-06-07

arxiv.org/abs/cond-mat/0406153v2

Phys. Rev. B 71, 073201 (2005)

Physics

Condensed Matter

Other Condensed Matter

4 pages, extra discussion on spin susceptibility and references added

Scientific paper

10.1103/PhysRevB.71.073201

Full expressions for finite frequency spin and charge conductivity in Rashba and Luttinger type systems are given. Whereas in the Rashba Hamiltonian the spin conductivity has the same frequency dependence as the dielectric polarizability, the Luttinger case is different. Moreover, for a generalized Rashba-type coupling the two quantities also exhibit different frequency dependencies.

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